Terrible jokes aside, there are some serious amenities, beyond the views and nifty notched corners, that could attract some of those tentative tenants to the building. One in particular is a roof garden at the 56th-story roof garden.

Still, that is nothing compared to what is on offer at 4 World Trade, which you can see around the 2:30 market in our video. “The right tenant can basically do whatever they want up here,” Jeremy Moss, director of leasing for Silverstein Properties, told us during our tour. “It’s a rare amenity.”

Indeed, and surprisingly comfortable for being many hundreds of feet up in the air. For illustrative purposes, The Observer has mocked up the terrace in the above image.